September weather forecast
Tiburon, CA

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The affluent hillside homes overlooking the yachts in the harbor, and the waterfront promenade in Tiburon, California
The affluent hillside homes overlooking the yachts in the harbor, and the waterfront promenade in Tiburon, California

Weather in September

September, the first month of the autumn in Tiburon, is also an agreeable month, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 72.3°F (22.4°C).

Temperature

In Tiburon, the peak average temperatures are observed in September, with a high of 72.3°F (22.4°C) and a low of 56.5°F (13.6°C).

Humidity

In September, the average relative humidity in Tiburon is 71%.

Rainfall

June through September are months with the least rain in Tiburon when the rain falls for 2.7 days and typically aggregates up to 0.08" (2mm) of rain.

Ocean temperature

With an average ocean temperature of 57.4°F (14.1°C), September is the month with the warmest seawater.
Note: Being in 57.4°F (14.1°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.

Daylight

In September, the average length of the day in Tiburon is 12h and 25min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:53 pm PDT.

Sunshine

The average sunshine in September in Tiburon, California, is 10.6h.

UV index

April, June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Frequently asked questions

What month is the hottest in Tiburon?

September tends to be the warmest month, with temperatures averaging a daily high of 72.3°F (22.4°C) and a low of 56.5°F (13.6°C).

What is the average September temperature in Tiburon?

September temperatures in Tiburon vary between a high-temperature of 72.3°F (22.4°C) and a low-temperature of 56.5°F (13.6°C).

What is the average humidity in September in Tiburon?

In Tiburon, the average relative humidity in September is 71%.

What is the driest month in Tiburon?

The months with the least rainfall in Tiburon, California, are June through September Rain falls for 2.7 days and accumulates 0.08" (2mm) of rain.

How many days does it rain in September in Tiburon?

In Tiburon, California, during September, the rain falls for 2.7 days and regularly aggregates up to 0.08" (2mm) of precipitation.

What is the month with the warmest ocean in Tiburon?

With an average ocean temperature of 57.4°F (14.1°C), September is the month with the warmest seawater in Tiburon.

What is the water temperature in September in Tiburon?

In September, the average ocean temperature in Tiburon is 57.4°F (14.1°C). Swimming in 57.4°F (14.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in September in Tiburon?

In September, the average day length is 12h and 25min.

When is the sunrise / sunset in September in Tiburon?

On the first day of September in Tiburon, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:53 pm PDT.

How long on average sun shines in September in Tiburon?

The average sunshine duration in September in Tiburon is 10.6h.

What is the month with the highest UV index in Tiburon?

The months with the highest UV index in Tiburon are April, June through September, with an average maximum UV index of 5.

How high is the UV index in September in Tiburon?

In Tiburon, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Tiburon, CA

Average temperature in September - Tiburon, CA
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is September (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (46.2°F).

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Average pressure in September
Tiburon, CA

Average pressure in September - Tiburon, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in September
Tiburon, CA

Average wind speed in September - Tiburon, CA
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are October and November (5.7mph).

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Average humidity in September
Tiburon, CA

Average humidity in September - Tiburon, CA
  • Average humidity in September: 71%

The months with the highest relative humidity are March and August (76%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in September
Tiburon, CA

Average rainfall in September - Tiburon, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are June, July, August and September (0.08").

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Average rainfall days in September
Tiburon, CA

Average rainfall days in September - Tiburon, CA
  • Average rainfall days in September: 2.7 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (1.9 days).

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Average sea temperature in September
Tiburon, CA

Average sea temperature in September - Tiburon, CA
  • Average sea temperature in September: 57.3°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).

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Average daylight in September /
Average sunshine in September
Tiburon, CA

Average daylight in September / Average sunshine in September - Tiburon, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in September
Tiburon, CA

Average sunshine days in September - Tiburon, CA
  • Average sunshine days in September: 24.5 days

The month with the most sunshine days is October (25 days).
The month with the least sunshine days is March (18.4 days).

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Average UV index in September
Tiburon, CA

Average UV index in September - Tiburon, CA
  • Average UV index in September: 5

The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Tiburon, CA

Average cloud cover in September - Tiburon, CA
  • Average cloud cover in September: 18

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).

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Average visibility in September
Tiburon, CA

Average visibility in September - Tiburon, CA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Tiburon, California, USA

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